What Does In-Memory Database (IMDB) Mean?

An in-memory database (IMDB) is a database management system that primarily depends on main memory for storing computer data. IMDBs are quicker than disk-optimized databases because they carry out fewer CPU instructions, and their internal optimization algorithms are much simpler. IMDB eradicates disk access by saving and manipulating data in the main memory. An IMDB commonly includes direct data manipulation and a dedicated memory-based architecture.

Techopedia Explains In-Memory Database (IMDB)

In-memory databases are designed to attain minimal response time, as well as extremely high throughput for performance critical systems. This is possible because data is saved and manipulated in the form used by the application, which removes overheads related to translation and caching. IMDB technology is capable of supporting application-tier deployment, real-time data management and most ACID (atomicity, consistency, isolation, durability) properties.